A 1400 kg car is approaching the hill shown in (Figure 1) at 11 m/s when it suddenly runs out of gas. Neglect any friction.

If I use the conservation of energy laws without considering thermal energy it seems like a simple energy conservation question, but I am given a diagram (shown below) that gives angles. I wouldn't need the angles unless I wanted to calculate the vertical distance for thermal friction, but I'm not given a coefficient for rolling friction ...